Description
The Ferco Coil Spring Cassette C4 CF – Replacement Window Balance Spring is designed for PVC window balance systems that utilize Ferco’s Constant Force (CF) technology. Finished in white, this cassette helps counterbalance the window sash, allowing smooth and controlled opening and closing while maintaining proper sash positioning.
Color: White
Type: C4 – 4 lbs
System: Constant Force (CF)
Application: PVC Windows
This unit is classified as C4, which is designed to balance window sashes weighing approximately 4 lbs. In the Ferco balance system, the letter designation refers to the tail length, while the number indicates the sash weight capacity. Tail lengths are categorized as A = Short Tail, B = Medium Tail, and C = Long Tail, allowing installers to select the appropriate configuration for different window designs.
These coil spring cassettes are stackable, allowing multiple components to be combined to achieve the correct balance for heavier sash weights. Installation typically begins with a short tail (A) cassette and progresses to medium (B) and long tail (C) components if additional balance is required.
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